Agar is used for solidifying culture media because: it does not affect the growth of bacteria it does not add to the nutritive properties of the medium the melting and solidifying points of agar solution are not the same all of the above
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15. Agar is used for solidifying culture media because:
- it does not affect the growth of bacteria
- it does not add to the nutritive properties of the medium
- the melting and solidifying points of agar solution are not the same
- all of the above
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- of 1 stion s page 30- F2 Which of the following terms is associated with the probability of a preparation not being sterile after it has been exposed to a sterilization process? Select one: Oa. Particulate Matter level Qb. Sterility Assurance level О с. Pyrogen Load level O d. Optimal Sterilization level F3 F4 F5 Ol پیار Q Search F6 F7 F8 F9 === 8 9 F10 Time left 22:34:03 F11 Next pageentic X G Which of the following are prope X elnterface/defaultui/player/modern.html?configuration=&preventRightClick=False&cc=en-US&ieCompatibilityMod.. 2 Orientation to Infection Prevention Exit Which of the following are proper disinfection steps? Check all the apply. O Remove organic matter O Disinfect only O Follow suggested contact time O Mix cleaning products to make the disinfectant more powerful O Disinfect O Disregard the product labels SUBMIT ENG 令中) IN 40 hoMacConkey agar plates represent ________ medium. a differential a minimal a selective both a differential and a selective both a minimal and a selective
- nt ● ● S ● Paragraph F 2. To determine if the type of agar affects bacterial growth, a scientist cultures on fou different types of agar. Five petri dishes are set up to collect results: One with nutrient agar and E. coli One with mannitol-salt agar and E. coli One with MacConkey agar and E. coli One with LB agar and E. coli Styles One with nutrient agar but NO E. coli EdAn inoculating loop must be flamed to uniform orange-hot from base to tip A. after culture is transferred to the wire loop but before transfer to new media B. before culture is transferred to the wire loop and after culture is transferred from the wire loop to new media C. after culture is transferred to the wire loop and before culture is transferred from the wire loop to new media D. before culture is transferred to the wire loop1. Which of the following methods is the best way to sterilize the apparatus used in a surgical operation? A. Pasteurization B. Incineration C. Boiling in water D. Autoclaving E. Disinfect with 75% alcohol
- 14. Identifying Unknowns • Gram Negative • A. Serratiea • Motile marcescens • Simmons Citrate • B. Enterobacter Negative aerogenes • Phenol Red Lactose • C. Pseudomonas Positive fluorescens • MR + VP – • D. Escherichia coli • EMB Green Growth • White colonies O E. aerogenes O P. fluorescens O S.marcescens O E. coliThe culture medium that contains penicillin is a type of ________media. A. Complex B. Reducing C. Differential D. Selective E. Chemically defined1 H 2 176 old culture Smear too BOTERC Losk like? + b. Failure to apply the decolorizer. + ne c. Failure to apply the safranin. Determine whether bacteria are motle or non-motle by looking at the growth in semi-solid medium What is the concentration of agar in (a) typical solid medium (b) semi sold motility medium? Arawer Q1 on Page 357. 7. Orygen Requirement: + d. Reversal of crystal violet and safranin stains. A questions 1.2 and 3 o Pg 83-84 Refer to the power point Questions 1 Predict the effect of the following "mistakes" made when performing a Gram stain. Your answer needs to address the predicted effect on both Gram-positive and Gram-negative cells. Consider each mistake independently. a. Failure to add the iodine. 414 gait to fer. 2 Both crystal violet and safranin are basic stains and may be used to do simple stains on Gram-positive and Gram-negative cells. This being the case, explain how they stain different cell types in the Gram stain. why? a cell wall. patem in…
- 12/ Which of the following factors increases biofilm accumulation? (select all that apply) V A. malocclusion V B. smooth surfaces V C. calculus V D. restorations E. use of fluoridated 9/ During biofilm formation, microcolonies form in layers as the bacterial colonies multiply. With increased size, colonies meet and coalesce to form a complex microbial community. © A Both statements are true. A © B Both statements are false. C. The first statement is true, and the second statement is false. D. The first statement is false, and the second statement is true. Question 11 Which of the following is found in a disease periodontal pocket? © A Gram positive cocci and lactobacillus species. O B. Primarily jam negative motile rods and spirochetes • C. Gram positive aerobes © D. Keystone pathogens.1. The technique used in bacteria for endospore staining can also be used to observe fungal spores. Select one: True False 2. Which of the following statements is/are TRUE? a. Agar does not provide nutrients to microorganisms. b. Peptone, pork extracts, and yeast extracts provide nutrients to microbes. c. Tap water must be used for preparing culture media. d. A & B are correct. e. B & C are correct Clear my choice 3. Motility of microorganisms is BEST observed with a a. Flagellar stain b. Hanging drop preparation c. Solid medium d. Negative stain e. Streak plate Clear my choice9. Which is statement below is the correct definition of the Sterility Assurance Limit (SAL). Select ONE answer. O The Sterility Assurance Limit (SAL) is a numerical value that predicts the probability that a microorganism has survived a pasturization process. O The Sterility Assurance Limit (SAL) is a numerical value that confirms that a microorganism has survived a sterilisation process. O The Sterility Assurance Limit (SAL) is a numerical value that predicts the probability thaț a microorganism has survived a sterilisation process. O The Sterility Assurance Limit (SAL) is a numerical value that confirms that a microorganism has survived a pasturization process. O The Sterility Assurance Limit (SAL) is a numerical value that predicts the probability that a microorganism has been erradicated during a sterilisation process